Electrical-signal transmitter



("No Model.)

G. S. MOTT.

YELEGTRIGALJSIGNAL TRANSMITTER.

110,252,242. Patented Jan. 10,1882.

' tions for giving the signal; and Fig. 4 is a side Uivrren STATESPATENT twice.

GARRET S. MO'IT, OF PHILADELPHIA, PENNSYLVANIA.

ELECTRICAL-SIGNALTRANSMiTTER.

SPECIFICATION forming part of Letters Patent No. 252,242 dated January10,. 1882.

Application filed November 17, 1881. (No model.)

To all whom it may concern:

Be it known that I, GARnE'r' S. Mor'r, a citizen of the United States,residing in Phil-adophia, Pennsylvania, have invented certainImprovements in Electrical-Signal Transmitters, of which the followingis a specification.

The object of my invention'is to construct a simple yet efiicientinstrument for transmitting electrical signals on tire-alarm, district,and similar telegraph lines; and this object I attain by combining witha break-plate to be moved by the operator two arms to throw a pivotedweighted contact-piece into and out of the path of the break-plate,according to the direction in which the break-plate moves, as more fullydescribed hereinafter.

In the accompanying drawings, Figure l is aperspeclive view of myelectrical-signal transmitter with the usual spring and gearing removed.Fig. 2 is a front view with the parts in their normal positions; Fig. 3,a similar view, showing the parts moved to the posiview of theinstrument, showing the inclosing case in section.

The frame of the instrument in the present instance consists of twoplates, A and A, connected together by rods a and secured to a base, B.To bear-in gs in the frame is adapted the main axis or shaft D, to whichis connected a spiral spring, E, tending to turn the shaft .in adirection contrary to that pointed out by the arrows, Figs. 1 and 2. Tothe front end of the axis D is connected a crank-arm, D, by which theshaft and its connections may be operated when it is desired to give asignal.

To this axis is also secured the break-plate F, whose periphery isprovided with teeth of a number and size necessary for the requiredsignal. Connected to this plate, or to the shaft carrying it, are twoarms,ff, in the present instance nearly at right angles to each other,for operating the weighted contact-lever, as described hereinafter. Thiscontact-lever G is pivoted to a block,'H, secured to but insulated fromthe plate A, and is provided with a contact-finger, g, and a weight, 9.When the-lever G is in its normal position the arm g rests on the blockH, while, when the lever is thrown over to bring the contact fingerginto the path of the break-plate, a projection on the lever G comes intocontact with the stop hon the block, and the weight g retains the leverin either position to which it is moved. The insulated block H isconnected by the wire h, preferably insulated, with the binding-post 19,while the break-plate F through the frame is electrically connected tothe postp, so that.when these posts are connected up in the usual mannerthe circuit will be closed and a signal given at the central officewhenever the contact-lever touches thebreak-phite F. The wei ht 'g isprovided with strips of insulating inaterial at the points where thearmsff' come into contact with it, so that there may be no elec tricalconnection between the weight and the arms.

The parts are shown in their normal positions in Fig. 2, with thecircuitopen, and when it is desired to give a signal the crank-arm D isturned in the direction of the arrow, Fig. 2, until the armf comes intocontact with the weight g, Fig. 1, and throws the lever over into theposition shown in Fig. 3. Then, the crank-arm being released, the springE, which has been wound up by the turning of thecrank, turns the shaft Dand break-plate back in the opposite direction, and as it does so thecon tact-fingerg comes into contact with the teeth on the break-plate,and each time it does so completes the circuit and gives a signal at thedistant station, until the armfcomes into contact with the weight 9again, tilts the lever G back to its normal position,'Fig. 2, and stopsthe further revolution of the shaft D.

In order that the shaft D may not be rotated by the spring E too quicklyto give distinct signals, it may be provided with an escapemovement, ormay be geared down in any ordinaryway, as shown in Fig. 4, forxinstance,where the shaft D is shown geared down through the pinions l, 2, 3, 4L,5, and 6 to the flier 7.

It will be readily understood that this instrument may be worked on aclosed circuit instead of an open one, as described above.

I claim as my invention- 1. The combination of a movable shaft carryinga break-plate and arms with a pivoted rying a break-plate and arms witha pivoted contact-lever adapted to he tilted bythc said lever adapted tobe operated by said arms, and arms into and out of the path of the teethof carrying a weight and a contact-finger, as and the break-plate. forthe purpose described. I 5

5 2. The combination ofthe frame, rotary shaft, In testimony whereofIhave signed my name carrying a break-plate, arms, and crank-hanto thisspecification in the presence of two subdie, and a spring, with apivoted contact-lever scribing wilnesses.

adapted to be thrown by said arms into and GARRET S. MOTT. out of thepath of the break-plate teeth, snh- Witnesses: 1o stantially as setforth. HARRY DRURY,

3. The combination of movable shaft cnr- HARRY SMITH.

